Geometric properties of functions containing derivatives of Bessel function
     
Yazarlar (2)
Kamaljeet Gangania Institute Of Innovation İn Technology & Management, Hindistan
Doç. Dr. Sercan KAZIMOĞLU Kafkas Üniversitesi, Türkiye
Makale Türü Özgün Makale (ESCI dergilerinde yayınlanan tam makale)
Dergi Adı Journal of Analysis
Dergi ISSN 0971-3611 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler Web of Science - Emerging Sources Citation Index
Makale Dili İngilizce Basım Tarihi 10-2024
Cilt / Sayı / Sayfa 32 / 5 / 2463–2484 DOI 10.1007/s41478-024-00737-0
Makale Linki http://dx.doi.org/10.1007/s41478-024-00737-0
Özet
Let Jξ(z) denotes the Bessel function of the first kind of order ξ. For three different kinds of normalizations of Nξ(z)=az2Jξ″(z)+bzJξ′(z)+cJξ(z), we find the radius for Ma–Minda classes: S∗φ-radii and Cφ-radii. We further establish the radii of γ-spirallike of order α and convex γ-spirallike of order α of these normalized functions. As an application of our results, we derive sufficient conditions for the Nξ(z) to be a member of the unified subclasses of starlike and convex functions. The obtained radii are sharp.
Anahtar Kelimeler
30C15 | 30C45 | Bessel functions | Ma–Minda classes | Radius problems | Starlikeness and convexity | γ-Spirallike functions